Tim Tesseneer, of Rutherfordton, says he was one of the first two men to reach the van after the pregnant woman drove it into the ocean north of the Silver Beach approach in Daytona Beach Tuesday afternoon.

Tim Tesseneer, of Rutherfordton, says he was one of the first two men to reach the van after the pregnant woman drove it into the ocean north of the Silver Beach approach in Daytona Beach Tuesday afternoon.

WXII's sister station in Orlando, WESH, reported that Tim Tesseneer, of Rutherfordton, said he was one of the first two men to reach the van after the pregnant woman drove it into the ocean north of the Silver Beach approach in Daytona Beach Tuesday afternoon. | Click here for coverage from WESH.

Investigators have not yet determined if the 31-year-old woman had a medical emergency or if there was another cause, but Tesseneer and other witnesses said the woman intentionally made a hard turn into the ocean. The children who were in the minivan are 3, 9 and 10.

The Obama administration will unveil a major climate change plan Monday aimed at a large reduction in greenhouse gas emissions from the nation's coal-burning power plants, a senior administration official told CNN.